Maro Publications

Chemical Vapor Infiltration (CVI)

Patents with Abstracts


Maro Topics



“Chemical vapor infiltration (CVI) is a variant on Chemical Vapor Deposition (CVD). CVD implies deposition onto a surface, whereas CVI implies deposition within a body.  Chemical vapor infiltration is widely used as a means of fabricating Ceramic Matrix Composites (CMCs) such as alumina/alumina (alumina fiber reinforced alumina), in which a chemical vapor consisting of AlCl3-H2-CO2 is deposited onto porous alumina fibers or preforms, or SiC/SiC (silicon carbide fiber reinforced silicon carbide).  The CVI-process was designed and first experimented by Professor Roger Naslain from the University of Bordeaux 1 on carbon fiber reinforced SiC composites for aerospace applications.” (Wikipedia, Chemical Vapor Infilration, 7/26/2012)


Patents with Abstracts

1. 8,216,641 
Method of fabricating carbon fiber reinforced composite material parts

Bouchard and Lherm Messier Bugatti, France, developed a method of fabricating a composite material part having carbon fiber reinforcement densified by a matrix, including making a coherent fiber preform of carbon fibers presenting holes formed from at least a first face of the preform, and densifying the preform by depositing therein a material constituting a matrix by means of a chemical vapor infiltration type process.  The holes are formed by causing a plurality of non-rotary elongate tools to penetrate simultaneously, the tools being substantially mutually parallel and presenting on their surfaces roughnesses or portions in relief suitable for breaking and/or transferring fibers they encounter, the tools being caused to penetrate simultaneously by moving a support carrying the tools, and the tools being selected to have a cross-section that makes it possible to obtain in the carbon fiber preform holes that present a cross-section with a mean dimension lying in the range 50 .mu.m to 500 .mu.m.  (RDC xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 

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(RDC 6/5/2012)


Roger D. Corneliussen

Maro Polymer Links
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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

** Date of latest addition; date of first entry is 7/26/2012.